GNGTS 2014 - Atti del 33° Convegno Nazionale

78 GNGTS 2014 S essione 3.1 Fig. 2 – Example of seismic reflection profiles collected with two different systems (Chirp III Teledyne-Benthos, Top; ISMAR-CNR μChirp, Bottom) along the same track in Lake Trasimeno. We note that lake deposits are penetrated down to 15-20 msec below the lake floor, with high vertical resolution (tens of cm) that enable us to analyze the fine details of the sedimentary structure. Fig. 3 – Left: morphobathymetric map of the Reno River segment immediately N of the Pontelungo bridge (Bologna); blue color indicate maximum depth. We note the presence of a large depression aligned along the river course at the base of the bridge. Right: normalized reflectivity of the river floor obtained by the analysis of the 200 kHz reflected signal. Red colors indicate high reflectivity.